ah! I apologize for not responding.
I bought a lot of little mini-puzzles for friends as gifts. (They're not in the picture below since I didn't want them to see what I was mailing htem.) Some postcards as well from various anime that I knew they had liked (mostly Howl, Totoro).
I got a few random things for the "special shorts" -- I had seen the water spider film that day and I wanted to take some stuff to commemorate that.
I did pass on a few beautiful limited cels I ogled for at least 30 minutes. There's a beautiful scene from Ponyo where she's running with the fish/waves and I REALLY wanted that ;_;
However, none of the other folks on the Ghibli Tour with me were excessive so I felt obliged to rein in my fangirl tendencies and not buy anything I couldn't pack easily.